Will spawn XMRig on system Idle

idlerig.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Timers;

namespace FrozenCoreAgent
{
    public class SysTrayApp : Form
    {
        private static readonly int TimerInterval = Properties.Settings.Default.TimerInterval;
        private static readonly int TimeOut = Properties.Settings.Default.TimeOut;

        [DllImport("User32.dll")]
        private static extern bool GetLastInputInfo(ref Lastinputinfo plii);

        internal struct Lastinputinfo
        {
            public uint CbSize;
            public uint DwTime;
        }

        [STAThread]
        public static void Main()
        {
            Application.Run(new SysTrayApp());
        }

        private NotifyIcon trayIcon;
        private ContextMenu trayMenu;

        public SysTrayApp()
        {
            trayMenu = new ContextMenu();
            trayMenu.MenuItems.Add("Exit", OnExit);

            // Icon
            trayIcon = new NotifyIcon
            {
                Text = "Starting",
                Icon = new Icon(SystemIcons.Question, 40, 40),
                ContextMenu = trayMenu,
                Visible = true
            };

            // Timer
            var aTimer = new System.Timers.Timer
            {
                Interval = TimerInterval * 1000,
                Enabled = true
            };

            aTimer.Elapsed += OnTimedEvent;
        }

        protected override void OnLoad(EventArgs e)
        {
            Visible = false;
            ShowInTaskbar = false;
            base.OnLoad(e);
        }

        private void OnExit(object sender, EventArgs e)
        {
            Application.Exit();
        }

        protected override void Dispose(bool isDisposing)
        {
            if (isDisposing)
                trayIcon.Dispose();

            base.Dispose(isDisposing);
        }

        private void OnTimedEvent(object source, ElapsedEventArgs e)
        {
            try
            {
                var ticksIdle = (uint)Environment.TickCount - GetLastInputTime();
                if (ticksIdle > TimeOut * 1000)
                {
                    if (!trayIcon.Text.Equals("Working"))
                    {
                        trayIcon.ShowBalloonTip(5, "Working!", ticksIdle.ToString(), ToolTipIcon.Info);
                        trayIcon.Text = "Working";
                        trayIcon.Icon = new Icon(SystemIcons.Warning, 40, 40);

                        KillProcess();

                        foreach (var program in new[]
                        {
                            @"C:\Users\Gustav\Documents\FrozenCore\FrozenCore-CPU\xmrig.exe",
                            @"C:\Users\Gustav\Documents\FrozenCore\xmrig-nvidia-win64\xmrig-nvidia.exe"
                        })
                        {
                            Process process = new Process
                            {
                                StartInfo =
                                {
                                    FileName = program,
                                    Arguments = "",
                                    WindowStyle = ProcessWindowStyle.Minimized
                                }
                            };
                            process.Start();
                        }
                    }
                }
                else
                {
                    if (!trayIcon.Text.Equals("Sleep"))
                    {
                        trayIcon.ShowBalloonTip(5, "Sleep!", ticksIdle.ToString(), ToolTipIcon.Info);
                        trayIcon.Text = "Sleep";
                        trayIcon.Icon = new Icon(SystemIcons.Shield, 40, 40);

                        KillProcess();
                    }
                }
            }
            catch (Exception exception)
            {
                trayIcon.ShowBalloonTip(5, "Error!", exception.Message, ToolTipIcon.Error);
            }
        }

        public void KillProcess()
        {
            var processes = Process.GetProcessesByName("xmrig").Union(Process.GetProcessesByName("xmrig-nvidia"));
            foreach (var pro in processes)
            {
                pro.Kill();
            }
        }

        public uint GetLastInputTime()
        {
            Lastinputinfo lastInPut = new Lastinputinfo();
            lastInPut.CbSize = (uint)Marshal.SizeOf(lastInPut);
            if (!GetLastInputInfo(ref lastInPut))
            {
                throw new Win32Exception(Marshal.GetLastWin32Error());
            }
            return lastInPut.DwTime;
        }
    }
}

Note to self: rewrite in sepples